Earthing battery banks [RE-wrenches]

Ron Schroeder wd8cdh at optonline.net
Wed Oct 3 04:57:49 PDT 2007


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If you have to float the system, earthing thru a spark gap will provide some 
protection.

Ron Schroeder
WD8CDH
NABCEP Certified PV Installer

----- Original Message ----- 
From: "Warren Lauzon" <windsun at wind-sun.com>
To: <RE-wrenches at topica.com>
Sent: Wednesday, October 03, 2007 7:18 AM
Subject: Re: Earthing battery banks [RE-wrenches]


>
> We have been having that debate among ourselves for years :P
>
> Electrically it seems like it is 50-50, sometimes better to float.  But 
> lightning protection with a floating system can be a real problem, and 
> with ungrounded batteries stuff can flash around all over looking for a 
> path to ground, even on nearby strikes.
>
> So 98% of the time we opt for a negative ground
>
> ..................................................................................................
> Northern Arizona Wind & Sun - Electricity From The Sun
> ..................................................................................................
> ----- Original Message ----- 
> From: "Carl Emerson, Free Power Ltd." <freepower at freepower.co.nz>
> To: <RE-wrenches at topica.com>
> Sent: Tuesday, October 02, 2007 5:54 PM
> Subject: Earthing battery banks [RE-wrenches]
>
>
>>
>> Hi Group,
>>
>> Has someone out there done a Scirocco MWI install and did they earth the
>> battery bank negative ??
>>
>> I understand that if the PV input is connected then earthing the battery
>> will upset the GFI on the solar.
>>
>> There is a general debate going over here as to whether to earth battery
>> negative or leave the battery bank to "float"
>>
>> Up to now I have earthed negative in every install.
>>
>> Comments appreciated
>>
>
>
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